* modified the ONC RPC server to better handle multi-buffer responses

* added generated classes
* added utilities for ONC RPC
* new dummy ONC RPC server for testing
* simple JUnit test for the server

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@125 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534